Evaluation of the Doppler shift principle as a diagnostic aid in obstetrics.
D001314:Auscultation; D005260:Female; D005313:Fetal Death / Q000175:diagnosis*; D005318:Fetal Heart / Q000502:physiology*; D006801:Humans; D008722:Methods; D010923:Placenta Previa / Q000175:diagnosis; D011247:Pregnancy; D014159:Transducers; D014465:Ultrasonics / Q000592:standards*; D014592:Uterine Hemorrhage